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Finding the Fourth Proportional to 79,812.10, 119,718.15 and 75,821.17

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Solution

The fourth proportional to 79,812.10, 119,718.15 and 75,821.17 is: 113,731.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,812.10 : 119,718.15 = 75,821.17 : x
  2. Step 2: Convert to fraction form
    79,812.10/119,718.15 = 75,821.17/x
  3. Step 3: Cross multiply
    79,812.10x = 119,718.15 × 75,821.17
  4. Step 4: Simplify right side
    79,812.10x = 9,077,170,392.79
  5. Step 5: Solve for x
    x = 9,077,170,392.79/79,812.10
  6. Step 6: Final answer
    x = 113,731.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.